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7d206cbc3c
Add syntax in SQL and XML to mark specific fields to allow override or not. Also add a new setting to control the default behaviour when overriding support is not specified.
31 lines
663 B
Markdown
31 lines
663 B
Markdown
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slug: /en/sql-reference/statements/alter/named-collection
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sidebar_label: NAMED COLLECTION
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---
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# ALTER NAMED COLLECTION
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This query intends to modify already existing named collections.
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**Syntax**
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```sql
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ALTER NAMED COLLECTION [IF EXISTS] name [ON CLUSTER cluster]
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[ SET
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key_name1 = 'some value' [[NOT] OVERRIDABLE],
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key_name2 = 'some value' [[NOT] OVERRIDABLE],
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key_name3 = 'some value' [[NOT] OVERRIDABLE],
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... ] |
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[ DELETE key_name4, key_name5, ... ]
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```
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**Example**
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```sql
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CREATE NAMED COLLECTION foobar AS a = '1' NOT OVERRIDABLE, b = '2';
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ALTER NAMED COLLECTION foobar SET a = '2' OVERRIDABLE, c = '3';
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ALTER NAMED COLLECTION foobar DELETE b;
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```
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